Help needed: MIUI 12 installation wiped OS - SOLVED

[Jac_Ques]

I decided to install MIUI 12 today and I first needed to (re)unlock my Phone which wiped all the data which I backed up first.

I set up the phone again and started the MIUI 12 installation

After the installation process the Phone is stuck on th Mi Logo constantly turning on and off.

I booted into TWRP and get the message that no OS is installed.

I reinstalled the Fastboot Rom chiron_global_images_V11.0.6.0.PDEMIXM_20200308.0000.00_9.0_global via MiFlash 2016.08.30.0 and got a success message but Phone still does not boot. TWRP still says no OS installed.

Note that the operation seemed too fast for a complete OS transfer at 1 second (see screenshot)

What am I doing wrong and how can get my phone working again?

Thanks in advance for any help.

 

[Jac_Ques]

I do realise that the problem is that USB debugging is not enabled on the Phone and I cannot enable it without Android running.

I assume once enabled I can use adb or MiFlash to restore Android.

So, does anyone know a trick to enable USB debugging?

 

[Jac_Ques]

Thanks.

Unfortunately I don't have a spare Smartphone and with Lockdown can't pick one up. So Telegram is a no go.

 

[Jac_Ques]

Problem solved. Thank you to jejemc and Bernd for their help.